Color blindness is a sex-linked recessive Genetic Disorder in which the affected person has difficulty telling the difference between certain colors. Color blindness is also known as being chromatically challenged, having abnormal color vision, or having a color deficiency. The most common type is not being able to tell the difference between red and green, but in rarer cases the person can only see in black and white. Since men only have one X chromosome, their chances of being color blind are much higher than in women, who have two X chromosomes. Women are more often carriers of the gene, and don't actually have color blindness. However women can be color blind too if they have two affected chromosomes.

Normal eyes distinguish color through cones in the retina of the eye which each have different light sensitivity. Color blindness occurs when something happens to a cone, whether it...